CPC C10J 3/52 (2013.01) [C04B 18/061 (2013.01); C10J 2300/1628 (2013.01)] | 22 Claims |
1. A method of manufacturing a coal ash material for use in concrete products by reducing sulfur concentration of a coal ash, the method comprising:
selectively screening the coal ash based on a predetermined particle size to remove a portion of the coal ash with sulfur concentrations higher than a desired sulfur concentration to yield a screened ash product, particles of the screened ash product being at least as big as the predetermined particle size; and
reducing the size of the particles of the screened ash product to produce the coal ash material meeting fineness requirements set forth in American Society for Testing and Materials (ASTM) specifications, American Association of State Highway and Transportation Officials (AASHTO) specifications, or both the ASTM specifications and the AASHTO specifications for coal ash for use with concrete.
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